Drain Pump Control - Daikin FCQ35B7V1 Service Manual

ESIE05-04
1.13

Drain Pump Control

Purpose Control the water draining from the drain pan.
Starting conditions The drain pump control starts the drain pump motor when one of the following conditions is fulfilled:
Normal control In normal control, the drain pump is turned ON at compressor starting and turned OFF 5 minutes after
the compressor has stopped (residual operation).
Float switch When an abnormal drain level is detected in the drain pan, the float switch opens:
activation during
1 The thermostat stays forced OFF.
thermostat OFF
2 The drain pump starts to operate for minimum 10 minutes (even if abnormality is solved within the
3 If the float switch closes again within 80 seconds, cooling operation can restart within the 10
Part 2 – Functional Description
Cooling operation is activated
Abnormal high water level is detected in the drain pan
ON
Drain pump
OFF
ON
Compressor
OFF
10 minutes).
minutes recovery period.
Water level
abnormality
Float switch
Normal
ON
Compressor
OFF
ON
Drain pump
OFF
Abnormal
Error processing
Normal
5 s
5 min
1 min 20
Functional concept
5 min
5 min
2–17
1
2
3
4
5